31 inches in cm
31 inches is 78.74 cm. That is also 787.4 mm, or 0.7874 metres, or 2 ft 7 in.
Factors from their legal definitions.
Show the workings
| Step | Sum | Answer |
|---|---|---|
| One inch in metres | 0.9144 m ÷ 36 | 0.025 m |
| One centimetre in metres | a hundredth of a metre | 0.01 m |
| 31 inches in metres | 31 × 0.0254 | 0.787 m |
| In centimetres | 0.7874 ÷ 0.01 | 78.74 cm |
Where the figures come from
- A yard in metres: 0.914 m per yard. Source: Weights and Measures Act 1985, Schedule 1. Checked 13 November 2026.
- Inches in a yard: 36 inches per yard. Source: Weights and Measures Act 1985, Schedule 1. Checked 13 November 2026.
Nearby values
| Inches | Centimetres |
|---|---|
| 26 inches | 66.04 cm |
| 27 inches | 68.58 cm |
| 28 inches | 71.12 cm |
| 29 inches | 73.66 cm |
| 30 inches | 76.2 cm |
| 31 inches | 78.74 cm |
| 32 inches | 81.28 cm |
| 33 inches | 83.82 cm |
| 34 inches | 86.36 cm |
| 35 inches | 88.9 cm |
| 36 inches | 91.44 cm |
How it works
To convert inches to centimetres, multiply by 2.54. Open "Show the workings" above to see this sum step by step.